Translate and update the minified GML's docs

1.1/minified-gml.xsd

@@ -5,10 +5,14 @@
 	elementFormDefault="qualified" attributeFormDefault="unqualified" version="3.1.1.2">
 	<annotation>
 		<appinfo source="urn:opengis:specification:gml:schema-xsd:gml:3.1.1">gml.xsd</appinfo>
-		<documentation>Dieses Ding ersetzt temporär das echte gml.xsd, solange einige
-		Versionen (2.7.x und früher) von libxml2 mit den abhängigen Schemareferenzen 
-		Schwierigkeiten haben.
-		07-Apr-2016 Detlev Balzer
+		<documentation>
+			This schema is a minified version of the full GML XSD (available at http://schemas.opengis.net/gml/3.1.1/base/feature.xsd).
+			It contains only the GML elements that are considered in LIDO. The reason for shipping a minified XSD version are threefold:
+			1. some versions of libxml2 (2.7.x and earlier) have problems with schema references depending on other schemas
+			2. GML provides some Schematron rules to ensure ISO compliance. These interfere with LIDO' Schematron rules by marking lido:gml elements as wrong for not being ISO compliant.
+			3. the validation is much faster without importing the full GML schema
+			
+			created 2016-04-07 by Detlev Balzer
 		</documentation>
 	</annotation>
 	<element name="Point">